Working in the restaurant industry makes it easy to overindulge, he says. Imagine working a 16- to 17-hour day, tasting food all day long, cooking, talking about food, being on your feet all day but not getting any actual exercise, and just wanting a beer after a mentally draining shift.

"You get off work, it's one in the morning, you go out, talk shop, and you end up eating a whole pizza or (drinking) a whole bottle of wine," he says. "You do that 60 or 70 days in a row, and I put myself in really bad shape."

In a matter of months, Blais ballooned to about 225 pounds.

Love sparks a change of heart -- and mindset

Blais says his "Aha!" moment came when he could no longer recognize himself in the mirror.

"I don't know that I could see my toes if I looked down," he says.

But there was another factor motivating Blais to shed pounds. Her name was Jazmin.

"What kick-started my weight loss was a combination of a really joyous thing and some massive depression: I lost a restaurant, and I found the love of my life -- my wife."

Blais gives Jazmin a lot of credit for his transformation. A competition junkie and a former personal trainer, she was (and still is) supportive and understanding; she kept him motivated on his weight-loss journey. They started running together, and today, the once-hefty chef has completed several half and full marathons.

"I had to get this pretty girl. I was this chubby guy, and I literally had to run after this girl," Blais says. "She'd run two miles, I'd be sucking wind behind her, but I eventually caught (up to) her and proposed to her at the end of my first race -- a 10K, the Peachtree Road Race. And we're still together."

For Blais, exercise took priority; healthier eating and, eventually, cooking came a little later. He "stopped eating and drinking so much in a social setting," which he says was easy for him. Eventually he started using healthy ingredients, such as raw oats, hemp seeds, goji berries, and cocoa nibs, which he now incorporates into his cooking at home and at his restaurants.

"Chefs are notorious for disregarding eating healthy," Blais says. "When we hear things like gluten-free, we rebel against that."

Now he says he understands the value of being aware of and embracing people's dietary needs.

"I feel like we have a public service as chefs in restaurants to provide people not only delicious food and a great experience, but also nutrition," Blais says. "When you can coax flavor out of healthy ingredients and not have to rely on some of the traditional ways of making food delicious, it makes the experience better because you walk out of that restaurant and you feel good about yourself."

The secret to tasty & nutritious dishes

Blais says the secret to making food healthy and delicious is "understanding base flavors" and "knowing what the dish you're trying to make healthier needs: Is it fat? Is it salt? Is it acidity?"

If you want to avoid using salt, Blais recommends adding spinach or celery, which have natural sodium in them. If you want the flavor of fat without the calories, go for mushrooms, he says. To make the patty for the Earth + Turf burger at Flip Burger Boutique, Blais mixes mushrooms in with the beef, for example.

"Those mushrooms actually give the burger a sense of fat, but there's no fat in it."

When cooking at home, Blais tries to get his two daughters, ages 5 and 3, involved in the kitchen as much as possible.

"Kids will eat anything that they make themselves," he says. "Just like if they made a picture for you, they're proud to show that to you. When they're in the kitchen, even if it's just kind of fake-stirring something, they'll eat it. That's how you get your kids to eat brussels sprouts!"

Brussels sprouts, spinach and mushroom burgers sound great in theory, but Blais says even the most strong-willed of us can't keep that up every day.

"I don't stay away from eating bad food -- just balance. As a professional chef, I'm watching how much I'm tasting during the day. Portion control for me is a big deal," he tells HLN.

And, of course, you can't skip the gym, even after you've achieved your weight loss goals.

"It's so hard to lose weight or to be healthy if you're not combining eating well with moving your body," he says. "I don't think one can exist without the other."

Blais says a variety of exercises keeps him healthy today. Besides running, he has recently started swimming and is considering training for a triathlon.

He says the key to sticking with exercise is finding something that doesn't feel like work.

"When I'm cooking, I don't feel like I have a job -- I just cook because I love to do it. When I run, I just do it because I love to do it," Blais says. "So you've got to find that fitness activity that you love so much that it doesn't feel like you're going out of your way to do a job."